<button type="button" class='tan-button' {{on "click" (perform this.toggleFollowTask)}} data-test-follow-button>
  {{#if (or this.followStateTask.isRunning this.toggleFollowTask.isRunning)}}
    <img src="/assets/ajax-loader.gif" data-test-spinner>
  {{else}}
    {{#if this.following}}
      Unfollow
    {{else}}
      Follow
    {{/if}}
  {{/if}}
</button>